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drm/radeon: check the alloc_workqueue return value in radeon_crtc_init()

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[ Upstream commit 7a2464fac80d42f6f8819fed97a553e9c2f43310 ]

check the alloc_workqueue return value in radeon_crtc_init()
to avoid null-ptr-deref.

Fixes: fa7f517cb2 ("drm/radeon: rework page flip handling v4")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2023-11-30 15:50:16 +08:00 committed by Greg Kroah-Hartman
parent 048cbfd605
commit c4ff554081
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/radeon/radeon_display.c
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@ -687,11 +687,16 @@ static void radeon_crtc_init(struct drm_device *dev, int index)
if (radeon_crtc == NULL)
return;
radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0);
if (!radeon_crtc->flip_queue) {
kfree(radeon_crtc);
return;
}
drm_crtc_init(dev, &radeon_crtc->base, &radeon_crtc_funcs);
drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
radeon_crtc->crtc_id = index;
radeon_crtc->flip_queue = alloc_workqueue("radeon-crtc", WQ_HIGHPRI, 0);
rdev->mode_info.crtcs[index] = radeon_crtc;
if (rdev->family >= CHIP_BONAIRE) {